Targeted therapy or immunotherapy for advanced or metastatic disease: ROS1 rearrangement positive...lorlatinib

...- Histologically or cytologically diagnosis of metastatic NSCLC that carries an ALK rearrangement or a ROS1 rearrangement...

...Metastatic or recurrent NSCLC with ROS1 rearrangement identified by NGS-based target sequencing 2....

...- Histologically or cytologically confirmed diagnosis of metastatic non-small cell lung cancer (Stage IV, AJCC v7.0) that carries an ALK or ROS1 rearrangement (ROS1-positive patients will only be allowed in dose escalation) as determined using a local diagnostic test or a commercial test or by the Food and Drug Administration (FDA)-approved FISH test, using Vysis® ALK Break apart FISH Probe, or the Ventana® immunohistochemistry (IHC) test....

...- Evidence of histologically or cytologically confirmed diagnosis of metastatic NSCLC (Stage IV, AJCC v7.0) that carries an ALK rearrangement, as determined by the Food and Drug Administration (FDA) approved FISH assay (Abbott Molecular Inc) or by Immunohistochemistry (IHC) (Ventana Inc), or a ROS1 rearrangement as determined by FISH or RT PCR or Next Generation Sequencing (NGS) via a local diagnostic test (LDT)....

...IIIC or IV accordingly to 8th classification TNM, UICC 2015) that carries an ROS1 rearrangement, as determined by the molecular biology platform of the investigator by FISH assay or by Immunohistochemistry (IHC), or Next Generation Sequencing (NGS) or RNA sequencing approach....

A total of 63 patients with NSCLC treated with lorlatinib under Taiwan lorlatinib EAP were identified, out of which 10 patients were ROS1-rearranged NSCLC...The overall objective response rate (ORR) was 30%, and intra-cranial ORR was 22%...The median progression-free survival were 24 months. All patients were still alive at the end of the study...This real-world expanded access study showed the durable treatment effectiveness of lorlatinib for previously treated NSCLC patients with ROS1 rearrangements. Safety profile was consistent with previous findings.

We reviewed the course of 144 patients with advanced ALK- or ROS1-rearranged NSCLC treated with lorlatinib in the second-line or later setting to assess the frequency of dose reductions resulting from treatment-related AEs (TRAEs) and the association between dose reductions and progression-free survival (PFS) and overall survival (OS)....Among all patients, the median PFS was 8.1 months (95% confidence interval [CI]: 6.4-11.8); the median OS was 20.7 months (95% CI: 16.3-30.5).

While on study, the complete intracranial response rate was 60%....The median intracranial and extracranial progression-free survivals were 38.8 months (95% confidence interval: 16.9-not reported) and 41.1 months (95% confidence interval: 17.6-not reported), respectively....Lorlatinib induced durable intracranial responses in patients with ROS1-rearranged NSCLC and prior isolated CNS progression on crizotinib.

Consecutive patients with advanced ROS1+ NSCLC treated with lorlatinib between October 2015 and June 2019 were included….Median progression-free survival and overall survival from lorlatinib initiation were 7.1 months [95% confidence interval (CI) 5.0-9.9 months] and 19.6 months (95% CI 12.3-27.5 months). Median duration of treatment with lorlatinib was 7.4 months (95% CI 6.5-13.1 months). Overall response and disease control rates were 45% and 82%, respectively.

In this phase 1, dose-escalation study, lorlatinib showed both systemic and intracranial activity in patients with advanced ALK-positive or ROS1-positive NSCLC, most of whom had CNS metastases and had previously had two or more TKI treatments fail.